This costume should really have its own category: Costumes For When You Have A Halloween Party Tonight And It’s Already 5 O’Clock. Yes, it’s extremely simple, but that’s the appeal. You can stop by a costume store and pick up a Medusa wig, combine it with your own cool clothes, and voilà! You’ll look exactly like Uma Thurman.

Seriously, we haven’t seen The Lightning Thief, so we have no idea if it’s any good. But the costumes look cool. Uma Thurman plays Medusa, the snake-headed Gorgon of Greek mythology, but she’s dressed in Matrixy-type modern duds. That’s what makes it easy to duplicate. The pieces we suggest, from left to right:

1. Medusa headpiece.
2. Turban headband. You need an open-crown turban like this, or just a black scarf, to wrap around your head and hide the latex edges of the silly snake thing.
3. Trinity duster. If you have a corset-laced steampunk coat, that would be even better; in the clips we’ve seen of the movie, Uma’s coat looks like it laces up the back.
4. Black sunglasses.

Other stuff: Wear all black under your duster—black pants and top, black boots if you have them.